| General Information about Area Code 636 | |
|---|---|
| Country | United States |
| State / Province / Territory | Missouri |
| Major City | St. Charles |
| Time Zone | Central (UTC-06:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 636-327 | Wentzville | Saint Charles | Landline |
| 636-899 | Portage Des Sioux | Saint Charles | Landline |
| 636-748 | Cedar Hill | Jefferson | Landline |
| 636-557 | Ballwin | Saint Louis | Landline |
| 636-887 | Wentzville | Saint Charles | Landline |
| 636-334 | Labadie | Franklin | Landline |
| 636-357 | Wentzville | Saint Charles | Wireless |
| 636-428 | House Springs | Jefferson | Landline |
| 636-345 | Saint Charles | Saint Charles | Landline |
| 636-394 | Ballwin | Saint Louis | Landline |
| 636-841 | Wentzville | Saint Charles | Wireless |
| 636-297 | Warrenton | Warren | Wireless |
| 636-410 | Saint Charles | Saint Charles | Landline |
| 636-237 | Chesterfield | Saint Louis | Landline |
| 636-387 | Saint Peters | Saint Charles | Landline |
| 636-462 | Troy | Lincoln | Landline |
| 636-932 | Marthasville | Warren | Landline |
| 636-426 | Portage Des Sioux | Saint Charles | Wireless |
| 636-861 | Valley Park | Saint Louis | Landline |
| 636-432 | Washington | Franklin | Landline |